[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

parcels/field.py

@@ -1349,7 +1349,6 @@ def unravel_index(self, ei):
         xi : int
             The z index.
         """
-
         _ei = ei[self.igrid]
         zi = _ei // (self.grid.xdim * self.grid.ydim)
         _ei = _ei % (self.grid.xdim * self.grid.ydim)